I saw a topic about it, ppl said that it makes shifting better and that you could get it from ford. They could order it for you, but it would void warranty if I'm not wrong... Don't know if it's true, but that's what ppl were saying.

I saw a topic about it, ppl said that it makes shifting better and that you could get it from ford. They could order it for you, but it would void warranty if I'm not wrong... Don't know if it's true, but that's what ppl were saying.

This comes standard on the 14' gt. You can use it with royal purple synchro max if you switch to synthetic tranny fluid. I have a bottle of it new that I can sell for $30 plus usps shipping if anyone is interested.

XL-18 is from Ford made for their MT82 trans along with the DCT fluid now, it won't void a warranty but a non authorized non-ford gear fluid sure could... if you are out of warranty, use what you want, if you want a gearbox warranty intact why not use the stuff from Ford without losing any sleep?..

I think it must increase the coefficient of friction when oil is squeezed into a film between the synchros. Red Line has a pretty good technical paper about the friction modifiers in their MTL & MT90 manual transmission lubes. Gotta believe the XL18 works similarly.